An 8-year journey

[asomotif]

Hmmm, one with uwer, one without

I did a quick and rough check on the Tropenmuseum collection.
Most keris on pictures being worn by balinese people have an uwer.
A lot of keris in their collection don't have uwer's.

The Tropenmuseum website is able to zoom in on the pictures.
If you are mathematical / systematical, you can get some info from their collection.